Extract ContentType from format

libs/ContentTypes/ContentTypeHandler.php

@@ -0,0 +1,53 @@
+<?php namespace Todaymade\Daux\ContentTypes;
+
+use Todaymade\Daux\Tree\Content;
+
+class ContentTypeHandler
+{
+    /**
+     * @var ContentType[] $types
+     */
+    protected $types;
+
+    /**
+     * @param ContentType[] $types
+     */
+    public function __construct($types)
+    {
+        $this->types = array_reverse($types);
+    }
+
+    /**
+     * Get all valid content file extensions
+     *
+     * @return string[]
+     */
+    public function getContentExtensions()
+    {
+        $extensions = [];
+        foreach ($this->types as $type) {
+            $extensions = array_merge($extensions, $type->getExtensions());
+        }
+
+        return array_unique($extensions);
+    }
+
+    /**
+     * Get the ContentType able to handle this node
+     *
+     * @param Content $node
+     * @return ContentType
+     */
+    public function getType(Content $node)
+    {
+        $extension = pathinfo($node->getPath(), PATHINFO_EXTENSION);
+
+        foreach ($this->types as $type) {
+            if (in_array($extension, $type->getExtensions())) {
+                return $type;
+            }
+        }
+
+        throw new \RuntimeException("no contentType found for {$node->getPath()}");
+    }
+}